You could try to fix this by removing the parameter @UpdateLastLoginActivityDate from the stored procedure aspnet_Membership_GetPasswordWithFormat. However, this is more of a hack than an actual fix. It looks like the method calling this stored procedure is not passing in a valid date to this parameter.
Also, you should make your password more secure, it is only 6 characters according to your snippet above, you should have atleast a 7 character password with atleast a capital, number, or non-alphanumeric character.
Wyatt Preul
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