bad stock type<----need help please!!!

[sugo_ni_gretchen]

i just installed ubuntu in my laptop yesterday...and because i was new to using ubuntu that i try tweaking my desktop and adding some new theme. there's this one particular theme (it's a login screen) that i've installed. after i reboot my computer to see how it looks...i've got a message unable to launch light coffee---bad stock type..so the ubuntu launch a random login screen but the problem is i can't seem to type my username and password...can someone help me with this??? i'll appreciate any help!!!

thanks in advance!!!

[athlon_crazy]

try go to init3 "ctrl+alt+backspace", login -> xconfig -> start gui