99 Boxster Won't Start w/a new battery

[btrain34]

I have a 99 Boxster with the tiptronic transmission that has been parked for about 3 months. Prior to it being parked, it was running fine. I have replaced the battery, verified that the immobilizer isn't the issue, and checked the fuses under the dash. The dash lights up but there is no crank now. Any ideas what else it could be? Is there any way to push start it with the tiptronic? Thanks in advance.