Conversion failed when converting date and/or time from character string.

Hi

I'm trying to select only July from show_held but I keep on getting the error message saying:

Conversion failed when converting date and/or time from character string.

I get error message after I write this code:

AND		show.show_held = '&July&'

As you can see from the below code, How do I select July from times_held_in_July?

thank you

	SELECT		event_name,
			DATENAME (MONTH, show_held) AS times_held_in_July
	FROM		event,
			show
	WHERE		event.show_id = show.show_id

-------------------------------------------------------------
Result:

event_name      times_held_in_July
Dressage	July
Jumping	        July
Led in	        July
Led in	        September
Led in	        May
Dressage	April
Dressage	July
Flag and Pole	July

	SELECT		event_name,
		        DATENAME (MONTH, show_held) AS  times_held_in_July

	FROM		event,
			show
	WHERE		event.show_id = show.show_id
	AND		show.show_held = '&July&'

------------------------------------------------------------
Result:

Msg 241, Level 16, State 1, Line 24
Conversion failed when converting date and/or time from character string.