After Conversion my postings say "GUEST"
 

So far I solved most of the issues from my SMF to vB Conversion, but something odd happend. Though I am the Main Admin (otherwise I couldn´t do what I can do) all the postings of me in the Forum that are imported from the other say that I am "GUEST" and don´t even show my new set Avatar & Signature. Why am I a "GUEST" according to the threads ?

Any help on that please ?
Thanks in advance.

Wolfseye