Bukkit

What version of DynamicEconomy are you using?:
v.9.2

Try to explain how to arrive at the problem:
1)i get on the server
2)i try to use some of the admin commands
3)it tells me that i dont have permissions
4)i already game my permissions group the necesary permissions

Please paste the error log, if any. (Also provide DynamicEconomy log)

17:25:30 [WARNING] Task of 'DynamicEconomy' generated an exception
java.lang.NumberFormatException: For input string: "?"
        at sun.misc.FloatingDecimal.readJavaFormatString(Unknown Source)
        at java.lang.Double.valueOf(Unknown Source)
        at me.ksafin.DynamicEconomy.EnderEngine.calcPrice(EnderEngine.java:220)
        at me.ksafin.DynamicEconomy.EnderEngine.incrementStock(EnderEngine.java:
136)
        at me.ksafin.DynamicEconomy.RandomEvent.run(RandomEvent.java:80)
        at org.bukkit.craftbukkit.scheduler.CraftScheduler.mainThreadHeartbeat(C
raftScheduler.java:126)
        at net.minecraft.server.MinecraftServer.w(MinecraftServer.java:533)
        at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:459)
        at net.minecraft.server.ThreadServerApplication.run(SourceFile:492)

17:25:30 [WARNING] Task of 'DynamicEconomy' generated an exception java.lang.NumberFormatException For input string: "?"

Fail in .yml fail???