Unable to deploy FBA solution

visigo.sharepoint.formsbasedauthentication has already been configured and working on my SP farm but recently the server had to be rolled back a day and now I’m finding the wsp soloution was removed.

When I try to deploy it I’m getting a "You cannot deploy this solution on this type of server computer as it is configured. This solution must be installed on a server of type: front-end Web server. " error.

I’m running a single server farm where everything except SQL is on the same server.Visigo

Sounds like something is corrupted on your SharePoint farm. I’d try running the SharePoint Products Configuration Wizard to see if that fixes up any issues.