Problem uploading Developer zip file

I'm getting the following message when I try to upload my RokuSDK.zip file... I have a Roku 2 1080p unit....

Development Application Installer

No Development Application Installed.

Choose File Install

Warning: Application size prevents it from working on Roku 1 players (17524227 > 2097152).

Install Failure: No manifest. Invalid package.

I appreciate any assistance.