multi-part identifier error

I am not terribly familiar with SQL/SQL Queries, but I am trying to prepare the following query:

SELECT T0.[DocDate], T0.[DocNum], T0.[CardName], T0.[NumAtCard], T1.[SubCatNum], T1.[Quantity], T1.[Price], T1.[LineTotal], T0.[DocStatus], T0.[U_ORDERED], T0.[SlpCode], T2.[Address], T2.[Address2], T2.[OwnerCode], T3.[LineTotal], T1.[Dscription] FROM [dbo].[ORDR]  T0 INNER JOIN [dbo].[RDR1]  T1 ON T0.DocEntry = T1.DocEntry, OINV T2 INNER JOIN RDR3 T3 ON T0.DocEntry = T3.DocEntry

I get the following error message:

1). [Microsoft][SQL Server Native Client 10.0][SQL Server]The multi-part identifier "T0.DocEntry" could not be bound.

2). [Microsoft][SQL Server Native Client 10.0][SQL Server]Statement 'Received Alerts' (OAIB) (s) could not be prepared.    19/06/2014  11:25:36  -1

What am I doing wrong??

Thanks in advance,

Courtney