i updated to electrum 3.0.5.
The old transactions i made with multbit classic do not appear in electrum. But they do appear hear :
https://tradeblock.com/bitcoin/tx/a85dd38103a43201e646d84dea00e08487ccaf92ba0c07b7fed14d860d91375b --> 1st transaction
https://tradeblock.com/bitcoin/tx/f6bdc473d719240703af07c39d20e3b837d87b0c0f8b34ae06b1265336a23a9d --> 2nd one

they do not appear in any other blochain website.

that's why I asked : wait or send again ?

http://hpics.li/652f0ed