You can use UDL files to easily create & setup your connection strings, try this first:
1) Create a new text file on your pc, then rename the extension from *.txt to *.udl.
2) Open the file & you'll see a wizard type screen, select the 1st tab, then work your way through the screens & click the OK button when you've finished.
3) Rename the *.udl extension back into *.txt and open the file up. You should see in the very bottom line only the resulting connection string which has been built for you here.
Remove the ";Persist Security Info=False" part of the bottom line, as well as any lines above this from the file, then copy the final text you're left with into either of these samples: