Question : how do i reinstall the client access server role for exchange 2007 need immediate assistance

ok last night we tried to install SP1 for exchange 2007.  it failed during installation and the errors that it told me i fixed and then tried to run it again and it failed.  i looked all over your site for help from other knowledge base posts and there was one that fit my problem exactly and it told me to uninstall the CAS and then reinstall it to fix the problems.  well i uninstalled the client access role and when i went to reinstall it i got the error "setup did not finish the builtobuild upgrade, the install option is not available"  now no one in my company has access to email and we are dead in the water.  What can i do to get this working???  i am really stuck, please help me fix this.

Answer : how do i reinstall the client access server role for exchange 2007 need immediate assistance

they will get you through it ........