SD Card Disconnects During Use on Treo 700p

Hi, new here to the forums. I was wondering if anyone has experienced a problem I have been having with my SD card lately.

I have a Verizon 700p with a SanDisk SDHC 4GB card. I did get both firmware updates way back when they were released, but this problem only started recently. Often times when I am using a program that accesses the card, like BackupBuddy, CallRec, SnapperMail, etc., at anytime during the data transfer I will hear the error tone and a message will come up saying that there is no card present. I have tried different size and brands of cards, and still the same thing happens. I am not sure if it's the contacts between the card and those inside the phone, or maybe a software issue.

Has anyone had a similiar problem? Any thoughts on what it may be?

Thanks so much!