经过近2周的准备，总算把材料都弄齐全了，到了最后关头，只差电子签名和付费了。但是我输入妈妈名字的汉语拼音之后（电子签名），总是说无效，说是
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The name, date of birth or country of birth you entered for your signature does not match the name you entered in your Online Application. To submit this Online Application, the names must match. Only the applicant can electronically sign this Online Application.
请问有没有过来遇到同样的问题？到底问题出在哪里？
先谢谢！