C&C Generals Zero Hour saved games no longer showing

HI,

I've played C&C Generals Zero Hour a number of times and often saved games, for different maps, in order to return and carry on playing.

I logged on recently and all the saved files, for any such games, are no longer shown to resume play.

I'd really appreciate it if some one will provide any solution for this issue.

Any replies and potential solutions are welcome.