I can't edit a txt file shared from Window server to Solaris

Hello, I'm working with Solaris and I need to share files between Windows Server 2012 and Solaris through an authentication with an Active Directory user, where Windows Server is the "main server". All was going good, until after see the WS files and I tried to open one and modify it, but I cannot modify the file, I'm ensure the folder where the file is located have read/write licences from WS. I was thinking that is some like a firewall or some protection that Solaris have 'cause I can take the file off from its folder (within Solaris), move it to the Desktop and when I try to open the file, a dialog box is displayed and says something like "do you want execute this file or open it whith Gedit?" when the file is only a .txt file, so I think Solaris identify the file as a executable file and try to defed itself from that file.
So I'm wondering if someone knows what happen whit it and how can I solve the trouble?

Here are screenshots about it that I hope make clear the question:

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