Simcom SIM5320E: Transfer a file from EFS to host.

I used command AT+CFTRANTX="C:/test.txt" to read data from file test.txt (test.txt file 100kbyte), but i only received about 4000 byte data.

AT+CFTRANTX="C:/test.txt"
+CFTRANTX: DATA,512
..........................................
+CFTRANTX: DATA,512
..........................................
+CFTRANTX: DATA,512
...........................................
+CFTRANTX: DATA,512
.....................................................
+CFTRANTX: DATA,512
.........................................................
+CFTRANTX: DATA,512
..........................................................
+CFTRANTX: DATA,512
.........................................................
+CFTRANTX: DATA,512
..............................................................
+CFTRANTX: DATA,264
..........................................................


+CFTRANTX: 0


OK
///////////////////Data received 4360 byte////////////////////////////////////////////
Interface Simcom and computer by usb comport baud 115200
Can you show me error ?