Help! 485 pending at Nebraska

My 485 pending at Nebraska center overdue for more than 4 months. My receipt date is in Jan. 2002. Current process date is May 31, 2002. I already done FP for twice. The 2nd one done in last Oct. is going to expired in Jan. 2005. Last Oct. USCIS request additional information - Current employer letter. I submitted (through lawyer) tiemly. Since then, I head nothing from USCIS. I called customer service in early Oct. this year, I was told that due to "caseload" at their center, my application need more time. Does anyone have similar situation? It is terriblle for me. Thanks.