Error: exceeds block gas limit

[pw96pw96pw96]

start node using
geth --testnet --syncmode "fast" --rpc --rpcapi db,eth,net,web3,personal --cache=1024 --rpcport 8545 --rpcaddr 127.0.0.1 --rpccorsdomain "*" --bootnodes "enode://20c9ad97c081d63397d7b685a412227a40e23c8bdc6688c6f37e97cfbc22d2b4d1db1510d8f61e6a8866ad7f0e17c02b14182d37ea7c3c8b9c2683aeb6b733a1@52.169.14.227:30303,enode://6ce05930c72abc632c58e2e4324f7c7ea478cec0ed4fa2528982cf34483094e9cbc9216e7aa349691242576d552a2a56aaeae426c5303ded677ce455ba1acd9d@13.84.180.240:30303" --etherbase 0x9466d48a0319499e4287ada23280b59ee7eb1a42 --unlock 0x9466d48a0319499e4287ada23280b59ee7eb1a42

0x9466d48a0319499e4287ada23280b59ee7eb1a42 is my account address.

Git clone the repository, run "truffle migrate".

Pengs-Mac-mini:Nectar pengwang$ truffle migrate
Using network 'development'.

Running migration: 1_initial_migration.js
Deploying Migrations...
... undefined
Error encountered, bailing. Network state unknown. Review successful transactions manually.
Error: exceeds block gas limit
at Object.InvalidResponse (/usr/local/lib/node_modules/truffle/build/cli.bundled.js:43303:16)
at /usr/local/lib/node_modules/truffle/build/cli.bundled.js:331156:36
at /usr/local/lib/node_modules/truffle/build/cli.bundled.js:175492:11
at /usr/local/lib/node_modules/truffle/build/cli.bundled.js:314196:9
at XMLHttpRequest.request.onreadystatechange (/usr/local/lib/node_modules/truffle/build/cli.bundled.js:315621:13)
at XMLHttpRequestEventTarget.dispatchEvent (/usr/local/lib/node_modules/truffle/build/cli.bundled.js:70159:18)
at XMLHttpRequest._setReadyState (/usr/local/lib/node_modules/truffle/build/cli.bundled.js:70449:12)
at XMLHttpRequest._onHttpResponseEnd (/usr/local/lib/node_modules/truffle/build/cli.bundled.js:70604:12)
at IncomingMessage. (/usr/local/lib/node_modules/truffle/build/cli.bundled.js:70564:24)
at emitNone (events.js:91:20)