Dead Lock

Hello !!!

I have 2 transactions, the first one has MANY updates to the table A and it finishes with a commit or rollback (ONLY AT THE END), the second one has only one insert into the table A that finishes with a commit or rollback, the problem is that the update process takes a long time to finish, and the insert process could be thrown during the first process, there's where I get everything locked cause the table A is locked and my java aplication gets stuck.

Note: When I execute each transaction independient I have no problems.

Is there any possibility to lock table A completly for the first transaction and release It for second one ??

Could you give me any suggestion of what to do step by step ?

Thanks !!!Are you running these processes by submitting SQL commands from your Java App, or are you just executing existing Stored Procedures?|||begin tran
select 1 from tableA (tablock) where 1=2
update...
if @.@.error != 0 begin
...
rollback tran
return (1)
end
...
commit tran