RDP "alternate shell" not working

Fixed using RemoteApp. For reference, here's the .RDP file generated with the Remote App wizard:

redirectclipboard:i:1
redirectposdevices:i:0
redirectprinters:i:1
redirectcomports:i:1
redirectsmartcards:i:1
devicestoredirect:s:*
drivestoredirect:s:*
redirectdrives:i:1
session bpp:i:32
span monitors:i:1
prompt for credentials on client:i:1
remoteapplicationmode:i:1
server port:i:3389
allow font smoothing:i:1
promptcredentialonce:i:1
authentication level:i:0
gatewayusagemethod:i:2
gatewayprofileusagemethod:i:0
gatewaycredentialssource:i:0
full address:s:192.168.1.5
alternate shell:s:||IVA
remoteapplicationprogram:s:||IVA
gatewayhostname:s:
remoteapplicationname:s:IVA.EXE
remoteapplicationcmdline:s: