T-SQL: select from array list parameter and return multiple results

Hello, I am trying to parse a array of ID's and then return the results:
ALTER PROCEDURE dxf1s_qqq.Getup_GetFriends
-- Add the parameters for the stored procedure here
 @FriendListID varchar(max),
 @FacebookID bigint OUTPUT,
 @CurrentL float OUTPUT,
 @CurrentP float OUTPUT,
 @CurrentU int OUTPUT,
 @Created datetime OUTPUT
AS
 -- SET NOCOUNT ON added to prevent extra result sets from
 -- interfering with SELECT statements.
SET NOCOUNT ON;
BEGIN
SELECT @FacebookID = FacebookID, @CurrentL = CurrentL, @CurrentP = CurrentP, @CurrentU = CurrentU, @Created = Created FROM Getup_Log.SplitInts(@FriendListID, ',');
RETURN
END

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When I execute it:
Running [dxf1s_qqq].[Getup_GetFriends] ( @FriendListID = 3391443009,3391443008, @FacebookID = <DEFAULT>, @CurrentL = <DEFAULT>, @CurrentP = <DEFAULT>, @CurrentU = <DEFAULT>, @Created = <DEFAULT> ).
Procedure or function 'Getup_GetFriends' expects parameter '@FacebookID', which was not supplied.
No rows affected.
(0 row(s) returned)
@FacebookID = <NULL>
@CurrentL = <NULL>
@CurrentP = <NULL>
@CurrentU = <NULL>
@Created = <NULL>
@RETURN_VALUE = 
Finished running [dxf1s_qqq].[Getup_GetFriends].

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I get null when I execute it, and I do have a data inside my table with these two FacebookID's
The table looks like this:
ID - int (auto identifyer)
FacebookID - bigint
CurrentL - float
CurrentP - float
CurrentU - int
Created - datetime
JoachimPetersenAsked:
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Anthony PerkinsCommented:
When you execute the Stored Procedure you need to define all the parameters as OUTPUT parameters.  If this is not clear, show us how you are executing the Stored Procedure and we can correct it.

Incidentally, this Stored Procedure does not return a result set.
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JoachimPetersenAuthor Commented:
I execute the stored procedure with Visual Studio Server Explorer (same as SQL management), I only parse the FriendListID array and I set the rest of the values as OUTPUT, do you want me to set the FriendListID as OUTPUT too?
Changing the @FriendListID varchar(max) to @FriendListID varchar(max) OUTPUT did not help, now it just simply only retruns the @FriendListID, the rest of the parameters is not returned.

what I want is simply: parse an array of ID's, select specific fields where the ID's match and retrun it somehow where I can simply manage the return values in asp.net / vb.net

A working example where you parse an array of ID's, select specific fields where the ID's match and retrun the values (the retrun value should be asp .net/ vb.net friendly), I can rewrite it to suit my needs myself.
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Guy Hengel [angelIII / a3]Billing EngineerCommented:
in your procedure, you cannot do a SELECT to return several records together with setting OUTPUT parameters.

so, I presume your stored procedure shall be rather something like this: 1 single input paramter:
ALTER PROCEDURE dxf1s_qqq.Getup_GetFriends
-- Add the parameters for the stored procedure here
 @FriendListID varchar(max)
AS
 -- SET NOCOUNT ON added to prevent extra result sets from
 -- interfering with SELECT statements.
SET NOCOUNT ON;
BEGIN
SELECT t.FacebookID, t.CurrentL, t.CurrentP, t.CurrentU, t.Created 
FROM Getup_Log.SplitInts(@FriendListID, ',') fn
JOIN sometable t ON t.ID = fn.value_column_please_put_the_correct_name_here_instead;
RETURN
END

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and in your calling code, you just define and pass that first parameter, the results are coming back as DataReader or Dataset, depending on you actually call it in the end
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