[Serusers] serweb: "DB Error: no such table"

Dear SER experts, I've downloaded and configured SER v0.9.3, as well as serweb, the head CVS version. I succeeds by serweb with subscribtion, logging on, and changing my own details. But the red message appears on my user page: "DB Error: no such table". However, again, there is now problem with actions mentioned just above. I'm not familiar with PHP, but I found that many php files under "serweb/data_layer/" directory contain the same "if" statement comprising the "DB_ERROR_NOSUCHTABLE" constant: if (DB::isError($res)) { if ($res->getCode()==DB_ERROR_NOSUCHTABLE) return true; //expected, table mayn't exist in installed version else {log_errors($res, $errors); return false;} } - it may be useful ... How should I locate & resolve this problem? Much thanks. -- Best regards, Timur Elzhov Warelex LLC