Like the others have said, I would call these people immediately. In the future, I would also recommend speaking with them first before sending them material that cost you money. Unsolicited material will almost always go unread. If your offering truely has value to theis company - and you present this to them properly in an email and a vm, they will call you back.

My guess would be - and assuming your product has value for them - is that they never looked at the material and have probably disgarded it. But, dont take this as anything other then it is. Get on the phone, establish your value, and Im certain they will either ask for another copy or request some time to discuss your solution. If you believe there's a good fit, and you've got the contact information of the decision makers - go for it and be persistent, yet professional - sounds like youve got a great shot at this one !!!!