I am sorry you are having issues with GenomeBrowse.
The search feature for tracks is currently only available for Local sources, if you have a gene track streaming from the cloud all you will see is Unknown in the search box as you type. So any tracks you would like to search need to first be downloaded locally to your system and then set to searchable for that feature to work correctly.
We are in the process of deploying a new annotations server that will allow for searching the cloud based sources as easily as the local sources. The new server will be available with GenomeBrowse 2.0 which is scheduled for release at the beginning of April.
Please let me know if you have any further questions.