Font colour in signature options not working?

[PGAmerica]

Hi, I was wondering if anyone could help with this

when users go to change their signature the drop down box for font colours shows like this:

http://i326.photobucket.com/albums/k419/JayatCFF/Admin/fontcol2.png

with no choices other than the default black - rather than:

http://i326.photobucket.com/albums/k419/JayatCFF/Admin/fontcol1.png

which are the colour choices we have everywhere else

any ideas on how to fix this so that members can change their signature font colours?

thanks!