I would love to hear your use cases on what kinds of transactions you monitor with SeUM. Do you use SeUM to test web apps before they go to production?
If you are using pass through authentication on the workstation where you created the recording the credentials may not have been properly captured. This issue, including a workaround is outlined in the KB article below.
http://knowledgebase.solarwinds.com/kb/questions/3214/Windows+Authentication+problems+when+playing+back+a+recording
Post clean up.
We should really try to keep this issue limited to a single thread. Support will be following up with you regarding your case, but if you could post the case number in the original thread I'll ensure it gets the attention it needs.