PROBLEMAS AL CAMBIAR LOS COLORES DE UN TEMA

Muy buenas,

No puedo cmabiar los colores de un tema, cuandl lo intento me sale el siguiente error:

¿Alguien sabe de que va? ¿A alguien le ha pasado algo parecido para indicarme por donde tirar?

Dice que hay algo que no está bien configurado pero no se que.

ERROR:
El fitxer themes/garland/images/menu-collapsed.gif seleccionat no s'ha pogut carregar perquè la destinació no esta configurada correctament.
El fitxer themes/garland/images/menu-expanded.gif seleccionat no s'ha pogut carregar perquè la destinació no esta configurada correctament.
El fitxer themes/garland/images/menu-leaf.gif seleccionat no s'ha pogut carregar perquè la destinació no esta configurada correctament.
warning: imagepng() [function.imagepng]: Unable to open 'files/color/garland-0adcbe24/body.png' for writing: No such file or directory in C:\Inetpub\wwwroot\drupal\modules\color\color.module on line 415.
warning: imagepng() [function.imagepng]: Unable to open 'files/color/garland-0adcbe24/bg-bar.png' for writing: No such file or directory in C:\Inetpub\wwwroot\drupal\modules\color\color.module on line 415.
warning: imagepng() [function.imagepng]: Unable to open 'files/color/garland-0adcbe24/bg-bar-white.png' for writing: No such file or directory in C:\Inetpub\wwwroot\drupal\modules\color\color.module on line 415.
warning: imagepng() [function.imagepng]: Unable to open 'files/color/garland-0adcbe24/bg-tab.png' for writing: No such file or directory in C:\Inetpub\wwwroot\drupal\modules\color\color.module on line 415.
warning: imagepng() [function.imagepng]: Unable to open 'files/color/garland-0adcbe24/bg-navigation.png' for writing: No such file or directory in C:\Inetpub\wwwroot\drupal\modules\color\color.module on line 415.
warning: imagepng() [function.imagepng]: Unable to open 'files/color/garland-0adcbe24/bg-content-left.png' for writing: No such file or directory in C:\Inetpub\wwwroot\drupal\modules\color\color.module on line 415.
warning: imagepng() [function.imagepng]: Unable to open 'files/color/garland-0adcbe24/bg-content-right.png' for writing: No such file or directory in C:\Inetpub\wwwroot\drupal\modules\color\color.module on line 415.
warning: imagepng() [function.imagepng]: Unable to open 'files/color/garland-0adcbe24/bg-content.png' for writing: No such file or directory in C:\Inetpub\wwwroot\drupal\modules\color\color.module on line 415.
warning: imagepng() [function.imagepng]: Unable to open 'files/color/garland-0adcbe24/bg-navigation-item.png' for writing: No such file or directory in C:\Inetpub\wwwroot\drupal\modules\color\color.module on line 415.
warning: imagepng() [function.imagepng]: Unable to open 'files/color/garland-0adcbe24/bg-navigation-item-hover.png' for writing: No such file or directory in C:\Inetpub\wwwroot\drupal\modules\color\color.module on line 415.
warning: imagepng() [function.imagepng]: Unable to open 'files/color/garland-0adcbe24/gradient-inner.png' for writing: No such file or directory in C:\Inetpub\wwwroot\drupal\modules\color\color.module on line 415.
warning: imagepng() [function.imagepng]: Unable to open 'files/color/garland-0adcbe24/logo.png' for writing: No such file or directory in C:\Inetpub\wwwroot\drupal\modules\color\color.module on line 415.
warning: imagepng() [function.imagepng]: Unable to open 'files/color/garland-0adcbe24/screenshot.png' for writing: No such file or directory in C:\Inetpub\wwwroot\drupal\modules\color\color.module on line 415.
warning: fopen(files/color/garland-0adcbe24/style.css) [function.fopen]: failed to open stream: No such file or directory in C:\Inetpub\wwwroot\drupal\modules\color\color.module on line 349.
warning: fwrite(): supplied argument is not a valid stream resource in C:\Inetpub\wwwroot\drupal\modules\color\color.module on line 350.
warning: fclose(): supplied argument is not a valid stream resource in C:\Inetpub\wwwroot\drupal\modules\color\color.module on line 351.