Yesterday I installed a three pound package into a new hive at about 4:30PM or so. The queen was healthy and all seemed to go as normal. late last night I checked on the bees and there is a large mass formed on the front of the hive. It remains that way this morning. Since it overlaps the where the top feeder and bottom box meet I pulled the feeder back just a bit this AM to allow a top entrance to the hive. Watched for a while and they still did not seem to want to go in. I've installed a lot of packages over the last few years but have never seen this kind of behavior. Any thoughts on whats going on????