485 RFE (employment letter)

I just got an I-485 RFE, requiring an employment letter. My 140 is extraordinary ability, approved by dec last year. I am a postdoctor (not a permanent position). As my understanding, this kind of 140 does not require a permanent job even without a job. I list the RFE letter below to see if anybody has any suggestion:

From INS:

"Submit a letter on your employer's original letterhead (not photocopy) showing you are employed full-time (40 hours per week) in a permanent job. Although you are not required to have an employer, you must provide evidence that you are working in your field of expertise. If you have evidence of employment please provide. It is unclear since your record indicates you are a visiting postdoctral scholar, which does not appear to be a permanent position."

所有跟帖： 

• when did you file 485? -回:复- ♀ (6 bytes) () 08/06/2004 postreply 11:30:02

• 回复：when did you file 485? -485RFE_080- ♀ (268 bytes) () 08/06/2004 postreply 11:38:34

• I think you better -回:复- ♀ (45 bytes) () 08/06/2004 postreply 12:10:26

• 回复：485 RFE (employment letter) -ying- ♀ (17 bytes) () 08/06/2004 postreply 13:12:31

• 回复：回复：485 RFE (employment letter) -485RFE_080- ♀ (38 bytes) () 08/07/2004 postreply 09:51:52

• I have a friend -,who- ♀ (130 bytes) () 08/06/2004 postreply 13:51:12

• 回复：I have a friend -485RFE_080- ♀ (114 bytes) () 08/07/2004 postreply 09:50:20

• 回复：485 RFE (employment letter) -oldhand- ♀ (432 bytes) () 08/06/2004 postreply 15:21:17

• 回复：回复：485 RFE (employment letter) -IgotOneToo- ♀ (463 bytes) () 08/07/2004 postreply 08:41:05

• 回复：485 RFE (employment letter) -485RFE_080- ♀ (121 bytes) () 08/07/2004 postreply 09:42:50

• 回复：485 RFE (employment letter) -lao3lao4- ♂ (0 bytes) () 08/07/2004 postreply 20:32:31

• should the salary in REF? -LV19- ♀ (0 bytes) () 08/09/2004 postreply 13:06:25