Please help!

My bank was recently bought out by Prosperity Bank and now I can't access their website on my Treo 650!

This is ridiculous, considering I used to be able to access my previous bank's site just fine to view my accounts and transactions.

I've been going back and forth with their IT Dept for weeks, but they insist that the cause is my browser. Apparently I have to have Internet Explorer to view their site. The strange thing is, on my Treo I can access the Prosperity Bank home page, and even enter my login info, but then I hit 'enter' and I'm taken to a blank white screen....SO FRUSTRATING! I need to be able to access my bank info when traveling.

Any other Prosperity Bank customers out there with more luck?

Thanks in advance!