Waiting for command

Hello, I've been having this issue with my new printer and after trying what I've seen on other threads my issue persists and I'm uneable to fix it.

I'm using a Microdelta Rework from Emotion-tech with firmware 1.7D without heated bed (https://www.emotion-tech.com/support-microdelta#files) and the version 2.1.6 of repetier with the MDRPlugin. The repetier-server is not installed and I also tried using version 1.6.2 of repetier.

When I connect the printer to repetier i get the following lines:  

19:08:17.395 : No start signal detected - forcing start
19:08:17.397 : N1 M11034
19:08:17.397 : N2 M11536
19:08:17.397 : N3 M10536
19:08:17.398 : N4 M11435
19:08:17.426 : N5 M111 S698
19:08:17.427 : N6 T060
19:08:17.427 : N7 M2022
19:08:17.429 : N8 M8019
19:08:17.429 : N9 M10546
19:08:17.495 : Begin file list
19:08:17.501 : Could not open directory /sd
19:08:17.502 : End file list
19:08:20.460 : N10 M10522
19:08:23.517 : N11 M10523
19:08:26.583 : N12 M10520
19:08:29.646 : N13 M10521
19:08:32.704 : N14 M10518
19:08:35.769 : N15 M105*19

It always stops at N14 or 15 and stays with "Waiting 1 command"  for a while, then it gives the following or it does not give anything at all:

19:09:15.803 : Communication timeout - reset send buffer block
19:09:15.803 : N16 M105*16

If you send commands before the N15 line, for example the homing command, the printer does it as expected. Also I tried the calibrating sequence of this printer, if sent before the N15 it starts but stops in the middle of the calibration.

I have tried everything said here: https://www.emotion-tech.com/support-microdelta#faq (in the last cage)
I have also tried what whas said in the forum, I tried different ports and baudrates (From 115200 to 250000, even though the config has the baudrate set at 115200). 

I need help with this.