Hi Jeffrey, sorry for not catching your post sooner. I see that you are having issues with accessing you racing teams/groups. I hope you've resolved this by now, but if not, read on!
The most common reason for this issue is due to the login ID used not being correct. Unfortunately, I can't help much with researching this issue without specifics, and I can't have you posting personal info, So, to the right on this very page is a 'Sports Help' link.
Click on it and look to the right of the page that loads, and select the 'Contact Yahoo!' button.
You will be required to fill out some drop boxes to send your request. You can choose the following:
Sports>Auto Racing>Notices and errors>unable to see teams - then enter a description. You can then email the sports team directly.
To ensure that the sports team can get you back to your team, please provide the group #, and the Yahoo! ID you are using to sign in with. I hope this helps!