绿卡申请材料被退回，紧急求助

我作为公民给妈妈(只她一人）申请绿卡，寄了I130和I485以及其他支持材料，加上两张支票 - $420 和$1070。今天所有东西被退回。

有两张FormI797C ，一张Reject I130, 另一张Reject I485. 理由相同，上讲：
The check amount is incorrect, or has not been provided. Please review the Form Instructions for fee information.Please resubmit the application/petition package with the appropriate fees to the address listed on the bottom of this page.

我支票title 写的是： U.S.Department of Homeland Security.

网上查了I130和 I485的Fee，没觉得错.

请各位大侠老师帮着看看！谢谢！

所有跟帖： 

• Reply -863211- ♂ (1080 bytes) () 03/24/2015 postreply 19:30:24

• 谢谢8老师！，我妈妈小于79岁。不知是不是我的支票出问题 -NJR84- ♀ (159 bytes) () 03/24/2015 postreply 20:50:19

• Reply -863211- ♂ (260 bytes) () 03/24/2015 postreply 21:24:51

• 是的， The word "dollars" is printed in the check. 我少写了 "and 00/100 -NJR84- ♀ (6 bytes) () 03/24/2015 postreply 21:27:25