I just got in an Eris that has the 2.1 ROM on it and I am not able to Root the phone. I have tried to downgrade to the 1.5 version and have had no success.

Does anyone on here have what it takes to downgrade to the 1.5 version so I can get this phone rooted? Thanks for your help.

PS. It appears this phone has the 2.1 leaked version. Thanks for any help.