mcpics

I have had my Dell Axim basic for several months no problem. Lately I have noticed anytime I go to my apps. calender, contacts...etc. there's about a 5 sec. pause before it responds. I check processor speed, it's set to 300. I only have a few things on the built in memory, with a 128mb sd card, and a 1gig flash card. Anyone know what would cause the slowdown.

thanks in advance for any advice