union all with order by newid()???

Question

Hai friends,
 
   here im getting error when im using union all and order by newid() together, can any one help me to solve this issue.. 

select distinct * from(select top 500 (A.AdId),A.AdImgPath,A.OnAdURL,A.AdSize from KZ_AdDetails A,KZ_Add_Cat Cat,KZ_Add_City Cit where  A.AddU_ID=Cat.AddU_ID and A.AddU_ID=Cit.AddU_ID and AdSize='250x250' order by newid()) X

union all

select distinct * from(select top 500 (A.AdId),A.AdImgPath,A.OnAdURL,A.AdSize from KZ_AdDetails A,KZ_Add_Cat Cat,KZ_Add_District Dis where  A.AddU_ID=Cat.AddU_ID and A.AddU_ID=Dis.AddU_ID and AdSize='250x250' order by newid()) Y

regards
Divya