My question involves an easement in the state of: Florida

The power company is claiming they had an agreement in 1941 concerning the easement through a subdivision where I own land. But now they believe the subdivision plat lines were drawn wrong in 1956. Now they have cut many large pine trees on my property which is approx. 30 x 170 long without my consent. They sent me a letter after the fact. I live in another state so was not there when the trees were cut. There is nothing written in my deed or description about this easement being where they claim. It is now 2011 and they haven't noticed this since 1956- 55 years! They want to build a new power line so now all of a sudden "oh my gosh, that's our land". This seems like unfair confiscation of our property. Am I correct? What can I do to rectify the situation?