Corel X5 -- Type 1 Fonts disappeared overnight -- Help please!

I use Windows 7 and Corel X5.  Last night all was well with documents I was working on using Type 1 fonts (which I own).  This morning I opened these documents and all the Type 1 fonts have disappeared.  In one document I could at least view the copy in wireframe view once, but could not use the type at all.  Tried converting to curves -- totally disappeared. 

Type 1 fonts all appear to be fine in Word (meaning it shouldn't be a Windows problem), and in Illustrator CS4 (meaning not a type problem).

Naturally I have to get three jobs out today using Type 1 fonts.

Help!

And, thanks.

Sonia