Unable to login when both Form Authentication and Windows Authentication is implmented

Error we were receiving :

Event code: 4006
Event message: Membership credential verification failed.
Event time: 19/11/2009 12:43:51 PM
Event time (UTC): 19/11/2009 1:43:51 AM
Event ID: 1bedfdd7dd734d0c8cbba1a3ae61c019
Event sequence: 112
Event occurrence: 1
Event detail code: 0

Application information:
Application domain: /LM/W3SVC/80145796/Root/RubikIBS-23-129029908738237500
Trust level: Full
Application Virtual Path: /RubikIBS
Application Path: C:\Inetpub\wwwroot\mobi\RubikIBS\
Machine name: SWIFT_HOMEBANK

Process information:
Process ID: 8352
Process name: aspnet_wp.exe
Account name: SWIFT_HOMEBANK\ASPNET

Request information:
Request URL: http://10.11.3.17:4747/RubikIBS/Login.aspx
Request path: /RubikIBS/Login.aspx
User host address: 10.10.9.99
User:
Is authenticated: False
Authentication Type:
Thread account name: SWIFT_HOMEBANK\ASPNET

Name to authenticate: 1938113

Custom event details:

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Well the issue was caused since the password in the database was changed hence it was authenticated via the forms authentication but it failed on Windows authentication