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Hope you are running 7.x, if sohostname(config)# same-security-traffic permit intra-interfaceAnd don't forget about NAThostname(config)# ip local pool clientpool 192.168.0.10-192.168.0.100hostname(config)# global (outside) 1 interfacehostname config)...
>>MTU 1500 bytes, BW 10000 Kbit half duplex Do you have 100/half duplex configured on purpose?It could be you have duplex or speed mismatch, check it and if required hard code it.