Fuji,
I've heard negative reports re Brussels ACC granting access to their Class B airspace but I've only been refused a couple of times. If you can make it to FL90 your chances are greatly increased. My last transit was September 15th, FL 70 KOK - MAK - LNO. We were climbed to FL90 just west of Brussels. This has been a pretty standard profile on previous transits. Where you headed?