Selecting Tables According To Sql Version Fails At Precompile

I am pulling info out of MSDB to report on job schedules. As we have a mixture of 2005 and 2000 servers, I am varying my select statement according to the result of
[Code]

Set @Version = SubString(Convert(VarChar(10), (Select ServerProperty('ProductVersion'))),1,1)

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I have to vary the tables for each condition. Not a problem,
[Code]
if @Version = 9
begin
Select whatever from table1 join table2
end
Else
begin
Select whatever from table1 join table3
end

Problem is that SQL 2005 is trying to verify the existence of the fields in the tables on compile (it knows that the table, for example, sysjobschedules exists in 2005, but the field "Name" doesn't - although it does in 2000) , even after the if statement checking if the version is 8, and SQL 2000 uses 2 tables whilst 2005 needs 3, and the fields I need are on one table in 2000, but in a different table in 2005.
SQL 2000 is fine with it - it just does it.
Syntax checking is fine.
Just to clarify, here is my code:
[Code]


Declare @Version Char(1), @CurrentDate datetime

Set @CurrentDate = GetDate()

Create Table #TempSchedDetails

( Server VarChar(30)

,CurrentDate VarChar(19)

,JobName VarChar(80)

,ScheduleName VarChar(80)

,Freq_Type Char(1)

,Freq_Interval VarChar(2)

,JobEnabled Bit

,Freq_Subday_Type VarChar(25)

,ScheduleEnabled Bit

,StartTime VarChar(25)

,EndTime VarChar(25)

)

Set @Version = SubString(Convert(VarChar(10), (Select ServerProperty('ProductVersion'))),1,1)

If @Version = '9'

Begin

Insert Into #TempSchedDetails

Select left(@@SERVERNAME,30)

,GetDate()--@CurrentDate

,J.Name

,SS.Name

,SS.Freq_Type

,SS.Freq_Interval

,J.Enabled

,SS.Freq_SubDay_Type

,SS.Enabled

,SS.Active_Start_Time

,SS.Active_End_Time

From msdb..SysJobs J

Left Outer Join msdb..SysJobSchedules JS on J.Job_Id = JS.Job_Id

Join msdb.dbo.SysSchedules SS ON JS.schedule_id = SS.Schedule_Id

Order By J.Name, Active_Start_Time

End

Else

Begin

Insert Into #TempSchedDetails

Select left(@@SERVERNAME,30)

,@CurrentDate

,J.Name

,S.Name

,S.Freq_Type

,S.Freq_Interval

,J.Enabled

,S.Freq_SubDay_Type

,S.Enabled

,S.Active_Start_Time

,S.Active_End_Time

From MSDB..SysJobs J

Left Outer Join MSDB..SysJobSchedules S On J.Job_Id = S.Job_Id

Order by J.name, Active_Start_Time



End
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Any ideas as to how to turn the precompile checking off in 2005?