EtherCard Library issue

I can not do anything even check my code because it gives me this:

In file included from C:\Program Files\Arduino\hardware\arduino\avr\cores\arduino/Arduino.h:28:0,
from C:\Users\Robert\Documents\Arduino\libraries\EtherCard/EtherCard.h:28,
from pings.ino:4:
pings.ino: In function 'void setup()':
pings.ino:31:24: error: invalid conversion from 'const char*' to 'prog_char* {aka char*}' [-fpermissive]
In file included from pings.ino:4:0:
C:\Users\Robert\Documents\Arduino\libraries\EtherCard/EtherCard.h:210:15: error: initializing argument 1 of 'static bool EtherCard::dnsLookup(prog_char*, bool)' [-fpermissive]
static bool dnsLookup (prog_char* name, bool fromRam =false);

version of the program was well arduino 1.0,1 1.6 and 1.5 this bug is already what can I do to make it right
Thank you in advance for your help