CM 6.0.1 errors
 

Dear Friends,
i have S8300D/G450 enviroment ...i have installed cm 6.0.1.510.1 successfully and configured it..but after few months i have getting issues that..
1- dadmin user/id password is not working....im unable to logged in with it..........but im able to logged in and administrate cm from my 2nd user id which i created in starting for safe side..which have admin rights
2- options on maintenance weblm are disabled..like server access menu, unable to take backup......unable to add/change user id /password ...unable to change account policies...etc.im also attaching the snapshots of errors..
should i need to re-install CM?

please review the attached snapshots and suggest the best possible solutions...
thanks....