when executing the stored procedure an error comes like this:conversion failed when cionverting the varchar value 'True' to int.

@strMode as varchar(2),
@TMID as int=null,
@UsersID as int=null,
@ClassID as int=null, 
@AAID as int=null 

if(@strMode='MA')
begin
	select A.Que_ID,A.Ans_ID,A.Ans_Answer,A.Ans_FileName,(select Ans_Answer from Answer where Ans_ID=cast(AD.ADD_Answers as int)and Q.Que_Type=3 and(AD.ADD_Answers<>'true' or AD.ADD_Answers<>'false')) as studentanswer,Q.Que_Type,Q.Que_Group,TD.TS_ID
	from ActivityDoneDetails AD inner join TestDetails TD on TD.Que_ID=AD.Que_ID and AD.AA_ID=@AAID and AD.Users_ID=@UsersID
				left outer join Question Q on TD.Que_ID=Q.Que_ID 
				left outer join Answer A on Q.Que_Id=A.Que_ID                 
	where TD.TM_ID=@TMID and (Q.Que_Type=3) and Q.Que_IsDeleted=0
end

When executing the stored procedure an error comes like this:<pre lang="text">conversion failed when converting the varchar value 'True' to int.