iTap RDP for iPad Logon issue

Does anyone have any experience with the iPad app "iTap RDP Remote Client"? It's the $11.99 one.

My wife surprised me with an iPad yesterday and there's this one thing on our Dell dekstop that she just absolutely has to be able to access with the iPad, so I installed the aforementioned app.
After much configuration on the Dell (firewall exceptions, etc.) I managed to at least connect to it.

The first thing it brings up after you establish a connection is the Windows Logon "Box". I entered my Windows account name correctly and the password. No dice. Error message was bascially saying to enter the name and password correctly (which I did). I should also mentioned I tried logging in from the iPad both when my account was logged in on the Dell and when it was logged off. No difference.

So, then I created a new administrator account and didn't assign it a password. Still wouldn't connect, but gave me a different error message. This error message said something about a problem with the type of account I was using. *rolls eyes*

I e-mailed iTap support, but I'm not expecting anyone to respond on the weekend. I was hoping maybe someone on here has used this app on the iPad and knows what the heck I'm missing. I'm just hoping it's something simple. I have Windows XP Pro 2002 SP3, so I know it's not the version of Windows.

Thanks in advance, everyone!

Have you enabled RDC on your Win machine? Check this page:

iTap mobile - iPhone applications

Nevermind, I finally got it working... somehow. ???

I still couldn't get it to accept my older username and password for my administrator account on my Dell. I created another administrator account and after going through all the steps again saw some tiny little print that said something to the effect of "to use remote desktop, an account must have a password". Once I gave the new admin account a password and logged off, everything worked. I'm a bit confused but incredibly relieved.