Configure SSO SPnego -- now logon fails

Hello,

We are trying to configure SSO in our system. First we have installed SSO with sap logon tickets between our SAP system and the Portal and it worked fine. Then we have tried to configure SSO with SPNego between the Windows Active directory and Java, but the problem was that after finishing the configuration we couldn't logon to the system via the I Explorer. We logged on perfectly to the visual administrator and to the configtool.

We have tried to undo the changes that the SPNego wizard, but we still cannot logon: well not exactly. Now, the I. Explorer when we go to http://localhost:50000 a windows security window ask for a windows user. If we put a windows user, then the sap logon window appears, and you put the user and password and the windows does nothing. If we put the sap user with bad password it says that the authentication fails. But, if we put a sap user in the windows authentication windows, it works and we can logon to the sytem information window (for example). We can logon only to the information pages. We cannot logon to the ume, because the windows authentication window doesn't appear.

We have tried to restore to a previous situation and the backup has failed.

Can you help us to go back to a stable point, please?

Thanks and best regards