How can I retrieve data?

Here is my sql procedure:

ALTER PROCEDURE dbo.SoftWareShow
/*
(
@.parameter1 int = 5,
@.parameter2 datatype OUTPUT
)
*/
@.SoftID uniqueidentifier
AS
SELECT [SoftID], [SoftName], [SoftJoinDate], [SoftSize], [SoftMode], [SoftRoof], [SoftHome], [SoftDemo], [SoftFirstClassID], [SoftSecondClassID], [SoftDesc], [SoftReadCount], [SoftDownCount],ltrim(rtrim([SoftUrlOne])) SoftUrlOne, ltrim(rtrim([SoftUrlTwo])) SoftUrlTwo, ltrim(rtrim([SoftUrlThree])) SoftUrlThree, ltrim(rtrim([SoftUrlFour])) SoftUrlFour FROM [SoftWare] WHERE ([SoftID] = @.SoftID)
RETURN

where I retrieve data using sqldatasource, an error appear. how can do ?

(1) your sql in your stored proc is wrong. You are using the parameter@.softId in your sql which is not in the parameter list in your procdefinition. either you would need to change the parameter name from@.parameter1 to @.softid or the otherway.
(2) you have declared @.parameter2 as OUTPUT type but you dont seem tobe returning anything through it. So you can get rid of it.