Problem using file as signature

I want to point the signature to a two-line text file.  I don't want to simply a text signature because the second line of my signature file changes frequently.

I can point the signature to my text file but it always prints as one line instead of two.

For example:

Instead of :

Jane

Have a nice day.

I get:

Jane Have a nice day.

My text file is formatted as two lines but somehow I lose the carriage return when the signature is put into the email.

Is there any way to fix this? 

Thanks in advance,