Active Directory Error

Below is an error message while trying to create an account in Active Directory through .Net code.
We are seeing the error very intermittently, only about 5% of the time.
Any ideas?  What to try?



ErrorMessage:
Exception from HRESULT: 0x80005009
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InnerException:
System.Runtime.InteropServices.COMException (0x80005009): Exception from HRESULT: 0x80005009
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StackTrace:
at System.DirectoryServices.AccountManagement.ADStoreCtx.Insert(Principal p) at System.DirectoryServices.AccountManagement.Principal.Save() at ADMethodsAccountManagement.CreateNewUser(String sOU, String sUserName, String sPassword, String sGivenName, String sSurname, Boolean& sExists) in C:\VSS_CODE\StBarnabas\StBarnabas\App_Code\ADMethodsAccountManagement.cs:line 309 at Login_NewAccount2.RegisterUserInActiveDirectory(String strOU, String strActiveDirectoryGroup, String strFirstName, String strLastName, String strLoginUsrname, String strLoginUsrpwd, String strMail, String strqualcareUserUniqueID, String strqualcareUserDOB, String strqualcareUserHealthplanGroupNum, String strqualcareUserHealthplanSubscriberNumber, String strqualcareUserLegalTermsAcceptedDate, String strqualcareUserLoginSecurityQn, String strqualcareUserLoginSecurityAns) in C:\VSS_CODE\StBarnabas\StBarnabas\Login\NewAccount2.aspx.cs:line 456 at Login_NewAccount2.btnSubmit_Click(Object sender, EventArgs e) in C:\VSS_CODE\StBarnabas\StBarnabas\Login\NewAccount2.aspx.cs:line 213
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