Msg 156 while using if exists, execute

[vs.vaidyanathan]

if not exists
(select * from sysobjects where name='amrreconAccountsTB')
begin
execute "create amrreconAccountsTB(acct_id char(2048) NULL)"
end;
Message from server 'NOCTREPI04' (Msg 156, Severity 15, State 2):
error near the keyword 'end'.
Can someone please help me and tell me what is the syntax error here?