Unable to POST/Upload as TCP Retransmitssion

Unable to POST/Upload as TCP Retransmitssion

I am trying to post/upload data/file to a server (I have access to its
settings) but it doesn't progress and after awhile I recieve page loading
error
When I monitor the network through WireShark the lines below are shown
(checksum error and bad tcp)
1170 53.165583000 192.168.1.2 78.39.102.77 TCP 1506 [TCP
segment of a reassembled PDU]
1293 57.661244000 192.168.1.2 78.39.102.77 TCP 1506 [TCP
Retransmission] 60849 > http [ACK] Seq=1 Ack=1 Win=66792 Len=1452
.....
in the details of lines it says the error occurs on IP packets and mainly
because of incorrect checksum (its 0x0000) and suggest maybe caused by ip
checksum offload
What is the problem as these messages says? and how should I solve it?
disableing checksum? changing the NIC....