Willie McKay, the agent for striker Daniel Cousin, is frustrated at the pace of the deal to bring the Gabon international back to Rangers.
"I'm waiting for a call from Craig Whyte. It's very slow," he said.
"I feel sorry for Ally [McCoist] because when [former owner] David Murray was in charge things happened. Five minutes later, you were there."
McCoist is waiting to hear whether Cousin, 35, is eligible to sign after leaving FC Sapins in his homeland.
Rangers are short of strikers, particularly since the departure of Nikica Jelavic for Everton.
"It goes without saying it's a department we definitely need strengthened in," said McCoist.
"So we are hopeful that we can get things finalised and get him over here.
"I've spoken to Daniel at great length over the last few days.
"I've watched his performances in the African Nations Cup as well and he is very keen to come.
"We haven't heard back from the Gabon FA. I know the boys at the SFA have been trying to contact them as well for total clarification on when his contract ended.
"Speaking to his agent and speaking to Daniel himself, they don't see any problems with that situation."
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“The boy is happy to come back but they have offered him 25% of what he was on in his last contract at Ibrox”
Willie McKayFootball agent
Agent McKay told BBC Scotland's Sportsound programme that Cousin is wanted by Championship clubs, plus others in Qatar and Dubai, but the striker's preference was to re-join Rangers.
"He can go elsewhere for three times the money but he fancied having Rangers Football Club back on his CV in probably his last season in football," said McKay.
"The boy is happy to come back but they have offered him 25% of what he was on in his last contract at Ibrox.
"They offered £7,500 then they came back and said 'we'll give you five grand a week'.
"It's only 10 weeks.
"Ally is doing his very best. I feel sorry for him."
Asked how dealing with the current Ibrox hierarchy compared to Murray's time in charge, McKay said: "I phoned up Alex McLeish about Jean-Alain Boumsong [in 2004].
"Five minutes later I was on my way to an airport in Lyon, on a private jet into Edinburgh, picked up by Sandy Jardine, job done.
"That's the difference."