PEAR with ODBC

Hi, my system: W2k SP3, Apache 1.3.27, PHP 4.3.1, PEAR last release, SAP DB 7.4, SAP ODBC-Treiber 7.04.03 vom 2003-01-29 with PHP+ODBC is the account to SAPDB no problem: $id = odbc_pconnect($dsn, $user, $pass) // museum, gast, gast with PHP+PEAR+ODBC it does not go at all, all the same which combination in the DSN-String I takes , for example: $dsn = "$phptype://$user:$pass@$host/$db_name"; or $dsn = "$phptype($db_name, $user, $pass)"; the error comes again and again: [nativecode=IM002 [Microsoft][ODBC Driver Manager] Der Datenquellenname wurde nicht gefunden, und es wurde kein Standardtreiber angegeben] ** odbc://gast:gast@pc1234-glemnitz/museum PHP find the Datenquellennamen(museum), PEAR not. Standard driver would have to be the ODBC entry nevertheless? Who brought the combination PEAR+ODBC already times to running? Or can reference supply itself with, how I could solve or encircle the problem? Thanks, Wolfgang