Distributed Query Problem

I have the following distributed query. I am running it from
SQL Server "CASTER" while it links databases from SQL1 and SQL2
Servers.

SELECT T1.ENTITY, T2.EMPLNAME, T1.EMPLID, T1.FISCAL_YR,
T1.ACCOUNT_NBR10, T1.POSITION_NBR, JOBCLASS, FINAL_BGT_FTE,
FINAL_BGT_PCT, FINAL_BGT_SAL, FINAL_BGT_FTB, TERM
FROM SQL1.BUDGET.DBO.BDBPDCTB T1,
SQL2.TECHRIS.DBO.TRBASCTB T2
WHERE T1.FISCAL_YR = '2003'
AND T1.EMPLID > 0
AND T1.EMPLID = T2.EMPLID
AND T1.ENTITY = 'H'
AND T1.ORGID = 'TT'
AND EXISTS (SELECT T3.EMPLID FROM SQL1.BUDGET.DBO.BDBPDCTB T3
WHERE T3.EMPLID = T1.EMPLID --------ERROR HERE
AND T3.ENTITY = 'H'
AND T3.FISCAL_YR = '2003'
GROUP BY T3.EMPLID
HAVING SUM(T3.FINAL_BGT_PCT) > 100)
ORDER BY 1,2,5,6

In the error line, it says, T1 does not match with a table name or alias name used in the query.

SELECT T1.ENTITY, T2.EMPLNAME, T1.EMPLID, T1.FISCAL_YR,
T1.ACCOUNT_NBR10, T1.POSITION_NBR, JOBCLASS, FINAL_BGT_FTE,
FINAL_BGT_PCT, FINAL_BGT_SAL, FINAL_BGT_FTB, TERM
FROM SQL1.BUDGET.DBO.BDBPDCTB T1,
SQL2.TECHRIS.DBO.TRBASCTB T2
WHERE T1.FISCAL_YR = '2003'
AND T1.EMPLID > 0
AND T1.EMPLID = T2.EMPLID
AND T1.ENTITY = 'H'
AND T1.ORGID = 'TT'
AND EXISTS (SELECT T3.EMPLID FROM SQL1.BUDGET.DBO.BDBPDCTB T3,SQL1.BUDGET.DBO.BDBPDCTB T5
WHERE T3.EMPLID = T5.EMPLID --------NO ERROR
AND T3.ENTITY = 'H'
AND T3.FISCAL_YR = '2003'
GROUP BY T3.EMPLID
HAVING SUM(T3.FINAL_BGT_PCT) > 100)
ORDER BY 1,2,5,6

When I am going to have the query like the above, i dont get any error.

Any help wd be appreciated.

Thanks
Sathya