New PStricks seems to have broken my prosper!

I've just downloaded the newest PStricks from CTAN, in the hope of 
surmounting some color problems. But now my file won't compile at all. I 
just get masses of error messages, of the sort:

PSTricks error. See User's Guide for further information.
Type H <return> for immediate help.
! Color `white' not defined.
\@pstrickserr ... immediate help.}\errmessage {#1}
\endgroup 

and of the sort

Runaway argument?
\\color@black \@@ \space \space 
! Paragraph ended before \c@lor@to@ps was complete.
<to be read again> 
\par 

There seems to be something very wrong with color. I'm using prosper v
1.24with tetex
1.0.7 -66.

If anybody has any ideas - I'd like to know them!

cheers,
Alasdair