Cisco ASA (Remote VPN) - Login Failed (Selective users)

Hi Guys,

I'm having issue on selective users which having "Login Failed" only when connecting to Remote VPN. Cisco ASA was integrated to LDAP server.. Here's the test we've conducted.

tried resetting the password.

1. Tried accessing different service using that acct and it working.. Issue only when connecting to SSL vpn.
2. ASA authentication test work successfull.
   

test aaa-server authentication RVPN-Group host x.x.x.x

INFO: Attempting Authentication test to IP address <x.x.x.x> (timeout: 12 seconds)

INFO: Authentication Successful

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Note: There's also an instance that when user tried changing his/her password.. this issue occur.

Anyone encountered this issue?

Thanks