SQL Server: Cannot resolve the collation conflict between 'Persian_100_CI_AI' and 'Arabic_CI_AS' in the equal to operation

hi 

when I execute it below error happen

Msg 468, Level 16, State 9, Procedure GCPWclass, Line 16Cannot resolve the collation conflict between "Persian_100_CI_AI" and "Arabic_CI_AS" in the equal to operation.

below is SP:

ALTER procedure [dbo].[GCPWclass]
  @PageIndex INT = 1
        ,@PageSize INT = 5
        ,@RecordCount INT OUTPUT
		,@behcode nvarchar(10)
AS
BEGIN
      SET NOCOUNT ON;
      SELECT ROW_NUMBER() OVER
      (
            ORDER BY [c].[date] asc
      )AS RowNumber
     ,c.id
     ,c.Name
     ,c.BehCode
     ,(select COUNT(classification) from House_p u  where u.classification=c.Name and BehCode=@Behcode group by u.classification) as TotalProduct
     INTO #Results
	 FROM House_classification c
	 where Behcode=@behcode
      SELECT @RecordCount = COUNT(*)
      FROM #Results    
      SELECT * FROM #Results
      WHERE RowNumber BETWEEN(@PageIndex -1) * @PageSize + 1 AND(((@PageIndex -1) * @PageSize + 1) + @PageSize) - 1   
      DROP TABLE #Results
END

my data base collation is "Persian_100_CI_AI" but why above error happen?

what should i do?

best regards

Neda