xiaobaitu和各位過來人， 請幫忙

昨天收到I485的RFE，不知道怎麽半才好，請你幫我看看，越是關鍵的時候越想；要多聽聽高手和過來人的建議。先謝謝了，原文如下：
1，employment letter:sumbit a latter on your employer"s original letterhead(not a photocopy) showing you are employed fuii_time (40 hour per week)in a permanent job. also, submit your form w-2 for the last three years to corroborate the employment letter.
2,prosepective employment letter:subit acurrent letter from the prospective employer who field the i-485 on your behalf to verify that they are still offering you a position.
這兩個的關鍵區別？在I-140之前一直是H4（2003，11---2005，10），11/2005申請到EAD之後才又在該公司工作的。