Hi <First name>,
I am using a cool new tool called Hifive that makes requesting and making introductions super easy. Learn more here.
While attempting to request introductions to people your LinkedIn network, I noticed that your network visibility is closed. By default on LinkedIn your network visibility is open, but sometime along the line you made it closed.
Are you comfortable in opening up your LinkedIn network?
If so, I've provided some instructions on how to open your LinkedIn network visibility.
More comprehensive instructions can be found here.