hi, i have the new waller for bitshare, but i cant my register account, i have this messsage

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7 0
getStackTrace@app.js:30:1161
 ○ request@app.js:36:8039
 ○ wallet_account_register@app.js:36:39503
 ○ register@app.js:32:4894
 ○ app.js:8:7670
 ○ e@app.js:8:14099
 ○ $eval@app.js:6:82585
 ○ $apply@app.js:6:82816
 ○ app.js:8:14156
 ○ dispatch@app.js:3:14429
 ○ handle@app.js:3:11204
10 assert_exception: Assert Exception
amount > 0: amount: 0
    {"amount":0}
    bitshares  transaction.cpp:101 withdraw

    {"account":"BTSJGi1ht1dcWyJBiQy5rBAUnHSpVrv57T7t","amount":0}
    bitshares  transaction.cpp:103 withdraw

    {"amount_to_withdraw":{"amount":0,"asset_id":0},"from_account_name":"shin2mars","trx":{"expiration":"2015-07-28T13:29:20","operations":[{"type":"register_account_op_type","data":{"name":"shin2mars","public_data":null,"owner_key":"BTS5TNc7q2RMwmbc72WgRmHzZCu9ocEaMdYzR1MoMZxCZvsyZ7KiT","active_key":"BTS5TNc7q2RMwmbc72WgRmHzZCu9ocEaMdYzR1MoMZxCZvsyZ7KiT","delegate_pay_rate":255,"meta_data":{"type":"public_account","data":""}}}],"signatures":[]},"required_signatures":[]}
    bitshares  wallet.cpp:97 withdraw_to_transaction

    {"account_to_register":"shin2mars","public_data":null,"pay_with_account_name":"shin2mars","delegate_pay_rate":255}
    bitshares  wallet.cpp:2895 register_account

    {"account_name":"shin2mars","data":null}
    bitshares  wallet_api.cpp:1019 wallet_account_register

    {}
    bitshares  common_api_client.cpp:4389 wallet_account_register

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why? Smiley

thx for reply