if you have problems with saving diagrams in other formats than bitmap [bmp], then the jangraphics.dll [this is the program that converts bmp into jpg/gif/png format] is not registered properly.
if you have windows xp installed on your machine, try this:
start -> run
in the "run" dialog, enter:
regsvr32.exe "
c:\chessdiagrammer\janGraphics.dll"
where
c:\chessdiagrammer must be replaced with the correct chessdiagrammer directory on your machine.
attention: please note the two quotes!
you will get a message, if the operation was successful or not: