7100t t-mobile, recently upgraded to 4.0

trying to access AOL IM, gives this message:

ERROR STARTING
INSTANT MESSAGING:
MODULE
'NET_RIM_MIDLETRESUMPTION'
NOT FOUND

won't let me get into anything, error message comes on the main screen.

any help would be appreciated i'm sure taking it into a t-mobile store won't help greatly.

Go to the 7100t upgrade site.
Find the Upgrade information Document.
Download it.
Read it.
On the last page, towards the bottom, is a section on how to reload IM.

I keep forgetting this step. At the risk of infringing upon copyright, I'm going to save T-Mobile the expense of a few trouble calls and post it here:

Troubleshooting Instant Messaging
After completing the handheld upgrade, if you receive the following error while accessing your Instant
Messaging application: “Error Starting InstantMessaging: Module 'net_rim_midletresumption' not
found”, please follow these steps:
1. Select Tools > Settings > Service Book, or Options > Service Book
2. Select T-Mobile USA IM Client Application, click the trackwheel and click Delete
3. Go back to Settings and click Applications
4. Highlight Instant Messaging, click the trackwheel and click Delete
5. Restart your device (the device may prompt you for this step)
6. Select Tools > Settings > Host Routing Table or Options > Host Routing Table. Click the
trackwheel and click Register Now.
7. A new Instant Messaging application will download over the air. You will know this process is
complete when you see the IM icon re-appear on your device’s screen