Function created successfully, but when called it gives an error!!

I created a function (check the code below) and it got created successfully.

Now I wanted to execute it, but it gave me the following error message:

Msg 208, Level 16, State 1, Line 2
Invalid object name 'dbo.TEST_TABLE'.

But I can see it there in my list of objects (check attachment1)

Why does it give me this error then?

CREATE FUNCTION TEST_TABLE
(
	@RequestTypeID int
)
RETURNS 
@MyTable TABLE 
(
	SystemID int, 
	DateOfSubmission datetime
)
AS
BEGIN
	insert @MyTable
	select Application_ID, Date_of_Submission from dbo.Request2_Log
	return
END

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function.JPG