［求助］安装ifrot问题

我在intel网站下载最新的非商业版本的ifort，邮件中收到了licence和序列号，但是我用他给的序列号 NC5M-Z436TCF5提示序列号不正确，按照本论坛提供的使用licence的方法也无法安装，只要不管怎么设置路径，当安装时就跳到这一步，如下

Step no: 1 of 7 | Welcome
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Welcome to the Intel(R) Fortran Compiler Professional Edition for Linux* version
11.0.

Intel(R) Fortran Compiler Professional Editions include not only the
high-performance Intel(R) Fortran Compiler Professional, but also Intel(R)
Debugger and Intel(R) Math Kernel Library (Intel(R) MKL) to create a strong
foundation for building robust, high performance parallel code at significant
price savings.
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You will complete the steps below during this installation:
Step 1 : Welcome
Step 2 : License agreement
Step 3 : Activation option
Step 4 : Installation configuration
Step 5 : Configuration summary
Step 6 : Installation
Step 7 : Installation complete
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Press "Enter" key to continue or "q" to quit: NC5M-Z436TCF5
Incorrect input, please try again
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请问这是怎么回事，如何设置路径，小弟看了两个大哥的方法，感觉于我的情况不太一样阿，请教各位大侠，帮帮忙，谢谢