[otrs] otrs can not find mysql-installation

Hello, I am new to otrs and did a fresh installation on a suse 7.3 system. I did install mysql from a binary package and all the mysql-test are ok. If I start otrs with rcotrs start the following error occurs: Starting OpenTRS Checking Apache ... done. Checking MySQL ... failed. --> Please start the database at first! (rcmysql start) <-- MySql was started wiht 'rcmysql start' and is running well, but it seems otrs can not find it. What has to be done, that otrs finds the mysql installation? Thanks for your help! Ralph Mueller