EP, new fields and showing in product page

Hello,

1- I add new field to my products and they work great with/without easy populate.
2- Now one of my fields should contain more than one line ( some thing like ) :-

**Compatible models: ( <= this is not changeable or editable from easy populate )
**

Xerox DocuPrint 4505
Xerox DocuPrint 4505ps
Xerox DocuPrint 4510
Xerox DocuPrint 4510ps

^ and this are the lines for example.

when i add this lines with this way in the admin aria without easy populate i add them like that :-

Xerox DocuPrint 4505<br>
Xerox DocuPrint 4505ps<br>
Xerox DocuPrint 4510<br>
Xerox DocuPrint 4510ps

and they work great.
3- when i did the same thing from easy populate ... i add the information with <br> too ..... I only see one line from them ?? and can't see the other lines ??
also when i am trying to save the file after edit it with Excel and i am trying to save it i got this msg :-

I am using Excel 2007