The following information was pulled from a thread on the forum pertaining to a stuck ejector and how to resolve the issue by removing the retaining pin, ejector pin and spring. Click the link at the bottom of this piece to view the full discussion on the forum.
When you lift the bolt head the ejector and spring will be laying on the rag or towel......MAYBE!
If not then you can try dripping Kroil, Liquid Wrench or a similar penetrating oil in and allow it to work a few minutes then slam it face down on a block of wood to free it. Fred (Sharpshooter) has had luck using a engraving tool to vibrate them loose.
Short of that you may have to visit you local friendly gunsmith or machine shop to have it removed.