Graphic Application running in 2000 but not in 98 why?

Hello.

We have developed an application where a user can create a greeting card using our background templates. The greeting requires user to select his/her image and also need to type the greeting message. The greeting is saved as BMP file of big file size around 100mb since the user have options to select largest paper size of 10"x15" with 300 DPI resolution.

The whole application is running well in windows 2000 plateforms but when I run the application in win98, Run Time Error, out of memory is shown and that too not during processing the card, this message is coming even when I click on Browse button for the user to select his image from his system. At some place or other this error pops up and application closes.

I am bugged fully with this error, Do you think I have to add some other components during installation of my application in win98?

Please update me at the earliest.

Thanks in advance.

Cartoon.