SAP Content server repository status shows offline

Hi,

we have recently upgraded our content server from CS 630 (max7.5) and CS 640 (Max 7.8) version.

After upgrade we redirected our content server connection to new server where content server with CS 640 (7.5) deployed.

content repository status shows offline.

serverType="SAP HTTP Content Server";serverVendorId="Copyright SAP AG, All rights reserved 1998, 2001";serverVersion="6400";serverPatch="9";serverBuild="201";pVersion="0046";serverStatus="running";serverStatusDescription="";serverDate="2013-01-14";serverTime="16:06:03";startUpDate="2013-01-14";startUpTime="15:58:28";lastAccessDate="2013-01-14";lastAccessTime="16:04:50";

contRep="ZKPRODMS";contRepStatus="offline";pVersion="0046";storage="ContentStorage";storageVersion="015";storageBuild="201";contRepDescription="DMS Repository";contentStorageHost="localhost";contentStorageName="SDB";secKeyVerification="y";defaultDocProt="";

please help us on this issue at earliest.

Thanks

Bhanu Prakash