My Wallet is not connecting to Bitcoin network.   The last time it was running the block took over two weeks and when it arrived just over 70% it stopped working.  Now I try each day to get the wallet to connect to get in sync again but no luck yet.  What can I do?  I downloaded Bitcoin Core - Wallet (testnet) and the bottom message Connecting to peers states 6 years and 31 weeks behind.  I installed my original wallet in 2011