The Sudanese side announced on Monday they are not willing to offer more than $600,000 to sign Al-Hadari on a permanent basis, failing to fulfill the White Knights' financial demands.
The Cairo giants had earlier announced that a season-long loan will cost Merreikh one million dollars, and double this amount for a permanent deal.
Zamalek interim president Galal Ibrahim assured that the hefty price tags are none-negotiable.
However, Al-Hadari, who's keen to part ways with Zamalek, called on him to try to meet Merreikh halfway, so as the deal goes through.
"I'm glad that Zamalek are in talks with Merreikh, that's in everybody's interest," the 37-year-old told Modern TV.
"I hope Galal Ibrahim can do me a favor and become a bit more lenient. He knows that I sacrificed a lot for the club."
Egypt number-one guardian Al-Hadari joined Zamalek from Ismaili on a three-year contract in the summer. He hasn't settled down at the former club since his arrival.
After a verbal jousting with his fellow shot-stopper Abdul-Wahed Al-Sayed, Al-Hadari repeatedly fell out with twin brothers Hossam and Ibrahim Hassan, head coach and football director respectively.
What also makes him frustrated is that he's currently serving a four-month ban that ends by February 2011 for illegally annulling his contract with Ahli in 2008 to join Swiss side Sion.
"I really don't know why negotiations always take a lot of time here (in Egypt). When I was joining Sion it took only one hour," Al-Hadari bemoaned.
"I hope talks between Zamalek and Merreikh end quickly and calmly. We have to be professional."
The troubled custodian was also linked with a January switch to Harras Hodoud.