ColdFusion CFFTP Timeout Value Cannot Be Dynamic

code-1.cfm

<!---
	Open the connection, cache it using, "objConnection",
	and give it a large timeout.
--->
<cfftp
	action="open"
	connection="objConnection"
	timeout="#(60 * 5)#"
	attributeCollection="#objFTPProperties#"
	/>

<!--- Close the connection. --->
<cfftp
	action="close"
	connection="objConnection"
	/>