HELP PLEASE!

(with my spelling it seems) DISAPPOINTED the title should read!!!!!!
I've used a PDA since my Psion LZ64, and I've use Pocket Informant on IAQ's for some years. :approve:
I've a new X51v (the A08 rom ones). and I've reloaded a few programs, including PI (Rev 5 build 574) all onto the 512 SD card.
PI is very unreliable, crashes for no reason, - the Microsoft "were sorry... screen is familiar.
I was expecting things to run a bit faster to be honest, - I've come straight from an IPAQ 4155 and my Aximj is either faulty or just slow.
I'm considering that PI might behave better in BIS rather than a SD card, but is there anyone who can verify that?
I'm a tad dissapointed, - the Axim has had such a good press, - I dont know if I was expecting to much or is that how WM5 is?
I have to either reset the Axim or it closes the program I'm working in about once an hour..... is that right?
Thanks guys, - hope you can restore my faith in this little ******