Open your Project in Editor & try the following:
1. Go to Files & Folders under Application Data and select the [GlobalAssemblyCache] folder from the Pre-defined folder list
2. Add your .Net Assembly under this folder
3. Behind the scenes, the appropirate component will be created with the attributes set
4. When you build your project, Editor will extract Assembly information and populate the respective MsiAssembly tables.
This is all you really need to do. If it does not work, then you may want to try looking at the following troubleshooting article:
http://support.installshield.com/kb/view.asp?articleid=Q111094