msi file not running when called through wix customaction

I have the following in my wix project but the msi file (which is valid and runs from the command line) will not run either with or without the silent parameter

<InstallExecuteSequence >
  <Custom Action="Runmymsi" A开发者_Python百科fter="InstallFinalize">Not Installed</Custom>
</InstallExecuteSequence>

I have run into this before. Your issue is that you can't call an MSI from another MSI. These need to be run at separate times. I would suggest writing a bootstrapper that will run your MSIs in the proper sequence.