windows 98 Will not Start

I have a pentium 133 running with 32 megs and a 20 gig hd. i had initianly windows 95 and decided to upgrade to windows 98. After the installation, i was unable to boot properly into my operation system. I am then prompted to pick a boot method of safe mode, command prompt, etc. If i choose normal windows 98 will not load. It starts the initial sequence but then goes to the windows shutdown screen. It never lets me boot into the os. I shut it down and go through the same routine everytime. can someone help me. The machine worked fine under windows 95 but the upgrade to windows SE.