At the moment, the European School of Economics is recognised by the Department for Innovation, Universities and Skills as a listed bodies
http://www.dcsf.gov.uk/recognisedukdegr ... y=Category
All those institutions or bodies, which for the time being, deliver courses that lead to degrees awarded by Recognised Bodies.
An applicant can claim 20 points if he/she has undertaken a period of study for the eligible qualification at an institution that:
-Is a United Kingdom recognised or United Kingdom listed body; or
-Holds a sponsor licence under Tier 4 of the points-based system.
From the look of things, I don't see the reason why someone should be refused based on the assumption that the school is not listed under the Tier 4 of the points-based system. There are two criteria for a student to be awarded the 20 points, either the school is a recognised/listed body or a Tier 4 licence holder. Since European School of Economics qualifies for the former, their students' shouldn't face any problem applying for the PWS.
When it comes to the issuance of visa, each individual's application are assessed differently. Most of the Case Workers are not conversant with the new system, confused and give different interpretations to the policy guidelines. Some may interprete the PSW as being a point-based system, the institution must be found under the Tier 4 list, and therefore applications from such institutions not found on the list do not qualify for the visa. I don't see the reason why you cannot apply for the PWS visa.
Is the college which is going to issue your degree or by another institution (university)?