Hi,
UFT 11.50 is not compatible with LR 11.52.
You can check the compatibility between:
1. UFT and LR in the following link:
http://support.openview.hp.com/sc/solutions/integrations.jsp?intid=697
2. QTP 11 and LR in the following link:
http://support.openview.hp.com/sc/solutions/integrations.jsp?intid=585
Kind regards,