Cannot register my instance - 404 error received

[exhesham]

When i run the next test:

from eureka_client import EurekaClient
import logging
logging.basicConfig()
ec = EurekaClient("MyApplication",
                  eureka_url="http://localhost:8080/eureka/v2/",
                  region="eu-west-1",
                  use_dns=False,
                  data_center="asdasdasd",
                  vip_address="http://localhost:7001/",
                  health_check_url="http://localhost:7001/app1",
                  host_name="localhost",
                  port=7001,
                  eureka_port=8080)
print ec.register()

I receive the next error:

Traceback (most recent call last):
File "test.py", line 20, in
print ec.register()
File "/usr/lib/python2.7/site-packages/eureka/client.py", line 161, in register
raise EurekaRegistrationFailedException("Did not receive correct reply from any instances")
eureka.client.EurekaRegistrationFailedException: Did not receive correct reply from any instances

When i curl the next url:

http://localhost:8080/eureka/v2/apps/MyApplication
I receive 404 but when i curl the next url:

http://whclsf-teva-dev-cc-bck4:8080/eureka/v2/apps/
I receive response status code 200 which means eureka server is up and running

the issue here is:
I ran the same configuration with Prana and it worked for me. but with your module, it didn't work!
According to the error and the code, you assume that my app was registered before or already registered!
what am i doing wrong?