Screen Actors Guild President Alan Rosenberg's latest effort to block resumption of negotiations with the Alliance of Motion Picture and Television Producers was blocked Friday when a three-judge appeals court turned down his request for a ruling to overturn a state court judge's refusal to issue a temporary restraining order. Rosenberg may pursue further legal challenges to the actions of the current board of the union, but the legal process is likely to be lengthy -- and costly. It is unclear who is paying the attorneys representing Rosenberg and board members Anne-Marie Johnson, Diane Ladd and Kent McCord, leaders of the Membership First faction within the union. Meanwhile, negotiations between SAG and the AMPTP are set to resume on Tuesday