Ok, I made a new friend (o:
put the DBI->trace() and Damn, this is usefull (o;

Strange, the $sth_imei execute successfully, but now rows are returned )o:
If tried directly in SQLPlus with the values which are binded, it works and returns the value I seek...

I also try to use this (__EOSQL__) and all to clean up my code as it is crap (o:{{

I am going to look into the hash reference...