build errors in RHEL4.7 AS 64bit

Hi,

 I trying to build libecap in RHEL4.7 AS 64bit EM64T and I keep getting these build errors. All development packages are uptdate gcc, glibc, boost but I know I am missing something? I am not a strong programmer and so I am sure that this is more of an error on my part but I have read through many email list on google and squid. So any information or pointers in the right direction would be greatly appreciated.

Output from make and I can supply any files other output needed.

n file included from ../../../src/libecap/common/area.h:7,
                 from area.cc:1:
../../../src/libecap/common/memory.h:7:22: tr1/memory: No such file or directory
In file included from ../../../src/libecap/common/area.h:7,
                 from area.cc:1:
../../../src/libecap/common/memory.h:13: error: `std::tr1' has not been declared
../../../src/libecap/common/memory.h:13: error: expected nested-name-specifier before "weak_ptr"
../../../src/libecap/common/memory.h:13: error: `weak_ptr' has not been declared
../../../src/libecap/common/memory.h:14: error: `std::tr1' has not been declared
../../../src/libecap/common/memory.h:14: error: expected nested-name-specifier before "shared_ptr"
../../../src/libecap/common/memory.h:14: error: `shared_ptr' has not been declared
In file included from area.cc:1:
../../../src/libecap/common/area.h:21: error: ISO C++ forbids declaration of `shared_ptr' with no type
../../../src/libecap/common/area.h:21: error: expected `;' before '<' token
../../../src/libecap/common/area.h:30: error: expected `,' or `...' before '&' token
../../../src/libecap/common/area.h:30: error: ISO C++ forbids declaration of `Details' with no type
../../../src/libecap/common/area.h:39: error: `Details' does not name a type
../../../src/libecap/common/area.h: In constructor `libecap::Area::Area(const char*, libecap::size_type, int)':
../../../src/libecap/common/area.h:31: error: class `libecap::Area' does not have any field named `details'
../../../src/libecap/common/area.h:31: error: `aDetails' was not declared in this scope
area.cc: At global scope:
area.cc:13: warning: converting of negative value `-0x00000000000000001' to `libecap::size_type'
area.cc: In static member function `static libecap::Area libecap::Area::FromTempString(const std::string&)':
area.cc:17: error: `shared_ptr' was not declared in this scope
area.cc:17: error: expected primary-expression before '>' token
area.cc:17: error: `details' was not declared in this scope
make[3]: *** [area.lo] Error 1

Thanks,

Jack