[CentOS] Help with TCL/TK on centos 5.2 unknown color black

Hi all,

I am using centos 5.2 x86_64 on a box. and getting this error: wish -f pcalert.tcl Error in startup script: unknown color name "black" (processing "-background" option) invoked from within "canvas .c -height $canvas_height -width $screen_width -background black -highlightthickness 0 " invoked from within "set c [canvas .c -height $canvas_height -width $screen_width -background black -highlightthickness 0 ]" (file "pcalert.tcl" line 138)

I take the same script on 3 other machines with centos 5.2 x86_64 and it runs just fine. What is the machine that gives the errors missing that is doesnt know what black is???

Thanks,

Jerry