EP installation error with database accounts

Hi,

I am doing EP installation in netweaver2004s sr1 on windows 2003(MS-SQLSERVER 2005).While running through sapinst.exe in the 11 th phase i am getting following error

ERROR 2006-09-20 19:29:49

MDB-05700 <p> MS SQL server cannot get information about account tdep\ep1adm .<br>Use the MS SQL Server tools to execute the command master..xp_logininfo 'tdep\ep1adm' and <br>analyze the errors returned. </p>

ERROR 2006-09-20 19:29:49

MUT-03025 Caught ESAPinstException in Modulecall: ESAPinstException: error text undefined.

ERROR 2006-09-20 19:29:49

FCO-00011 The step doGrantOsLogin with step key |NW_Onehost|ind|ind|ind|ind|0|0|NW_Onehost_System|ind|ind|ind|ind|1|0|NW_CreateDBandLoad|ind|ind|ind|ind|9|0|NW_CreateDB|ind|ind|ind|ind|0|0|NW_MSS_DB|ind|ind|ind|ind|2|0|MssOsUser|ind|ind|ind|ind|11|0|doGrantOsLogin was executed with status ERROR .

please suggest for following

1.Please give me the all possible answers to solve this error.Please respond quickly,i was stucked in this error from past 2 days.

2.After database installation i have created user id adm.Is it causes for error and let me know adm user can be created by default after installation or not???

3.After getting this error,i went through some notes and i have deleted the user id <sid>adm.Will it creates any problem in future???can i create the same user again???

Thakns&regards,

Ravikiran.