Open sourcing as a strategy works when there is a lot of developer interest and (usually) a developer is the beneficiary of the software (that doesn't mean the developer is the end user, but take WordPress, even if it's used by a lot of marketers for websites, it is developers who are the ones using it to produce those websites).

If your product is CRM/ERP, is there a lot of developer involvement in the provision of the software? And if not, what is the enabling factor for your beneficiaries to be able to take a FOSS package and begin to realize value? Don't confuse positive feedback of "this is cool" etc with positive feedback from buyers and beneficiaries.

FOSS B2B software communities work when there is value in not using the commercial version. Why would anyone who needs a CRM/ERP want to use a FOSS product when they would have budget to buy a commercial version and gain commercial support. I would assert that all users of CRM/ERP software have budget - unfortunately they just don't want to spend it on your product and so why would they then want to take the same product for free instead?

I think you need to have a clear reassessment of why your business is where it is (where it isn't) and what would change that. Not sure that open sourcing solves that. Good luck.