blackout curves dialog box

[Lenscapes]

i am using photoshop 7 and for some unknown reason, my curves dialog box is blackout recently. can't see the diagonal line at all. the whole box is black.:dunno:
i can still make changes by sticking the cursor inside the box even tho i can't see the diagonal line.
did i click on something i shouldn't have? thanks in advance!

 

[waiaung]

im out of touch with Photoshop7 already.
So please dont take my words for granted.

But the problem to me, sounds more like a program error.
If there's no other solution, re-installing the program would help, I guess.

 

[Lenscapes]

yes i did uninstalled and reinstalled again. yet the problem didn't go away. guess upgrade is the only option. tks anyway.